Affiliation:
1. College of Chemical Engineering and Material Sciences, Quanzhou Normal University, Quanzhou, 362000, China
Abstract
Background:
In this work, the reduced graphene oxide decorated with gold nanoparticles
(Au/rGO) had been synthesized on glass carbon electrode (GCE) using a simple one-step electrochemical
method. The molecularly imprinted poly(p-aminobenzoic acid) (PABA) film was prepared
for the analysis of sunset yellow (SY) on Au/rGO/GCE by electropolymerization of p-aminobenzoic
acid (pABA) and SY.
Methods:
Methods, such as scanning electron microscope (SEM), cyclic voltammetry (CV), and
electrochemical impedance spectroscopy (EIS) were used to characterize the successful formation of
imprinted films.
Results:
Under optimized experimental conditions, the Au/rGO/GCE based molecularly imprinted
sensor (MIP/Au/rGO/GCE) exhibited excellent performance for SY, and a linear range was obtained
from 0.002 μM to 8 μM with a detection limit of 0.5 nM. The responses of the imprinted sensor
maintained higher than 93% of the initial values after 15 days of storage.
Conclusion:
The MIP/Au/rGO/GCE has been used for the sensitive and selective detection of SY in
real food samples with acceptable recoveries, the combination of Au and rGO significantly improved
the sensitivity of the proposed sensor due to the synergistic effect of gold nanoparticles and rGO.
The resulting sensor also exhibited satisfactory reproducibility and stability, and the proposed platform
could be further expected for the detection of other food additives and various electroactive
species.
Funder
Natural Science Foundation of Fujian province, China
Publisher
Bentham Science Publishers Ltd.